Q:
# How Do You Solve an Equation With a Calculator?

**To solve an equation with a calculator that is programmed with the order of operations, enter the exact equation and press the solve or equal button.** If the calculator does not have the order of operations, enter the equation pieces based on the proper order of operations to solve.

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The order of operations is parentheses, exponents, multiplication, division, addition and subtraction. It is frequently remembered by the phrase "Please Excuse My Dear Aunt Sally" as a memory trick for PEMDAS. For an equation, first solve all parentheses working from the inside of multiple parentheses towards the outside. Second, solve all exponents from left to right. Third, solve all multiplication and division simultaneously, working from the left to the right. Fourth, solve the addition and subtraction at the same time, working from the left to the right.

If an calculator solves an equation by providing an answer with every new entry for the equation instead of waiting until all of the equation is submitted, then the order of operations is not being properly used and the resulting answer is incorrect. The equation needs to be rearranged based on PEMDAS to find the correct solution. A simple test for a calculator is the equation 4+2*3. The resulting answer is 10 if the order of operations is used. The wrong answer is 18.

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